BP hasn't eaten in 4 months/(found worms in water bowl)parasites???

[Bogertophis]

The last time I let him crawl outside was over a year ago, so I doubt the parasites are from then. When I found the worms in the water bowl, they were swimming quite well, so I'm guessing that they must've been some aquatic type of parasite.

Snake intestines are rather "aquatic" too though. And if he caught parasites a year+ ago, it can take a while until they build up to the point where they're being defecated out. By that time, they may also have done a fair amount of internal damage by now, not to mention stealing the nutrition that your snake needs to grow with optimal health. Out of an abundance of caution, in case these ARE his parasites, I would not wait too long to get him/his stool tested...for his sake.